syzkaller login: [ 37.873026] BUG: Bad rss-counter state mm:00000000b983e6a4 type:MM_FILEPAGES val:33 [ 37.874502] BUG: Bad rss-counter state mm:00000000b983e6a4 type:MM_ANONPAGES val:22 [ 38.031069] ================================================================== [ 38.032169] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.033147] Read of size 8 at addr ffff88801a1e5310 by task sshd/221 [ 38.034027] [ 38.034246] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.035118] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.036116] Call Trace: [ 38.036451] <TASK> [ 38.036744] dump_stack_lvl+0x91/0xf0 [ 38.037237] print_report+0xcc/0x620 [ 38.037717] ? __virt_addr_valid+0x102/0x340 [ 38.038271] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.038893] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.039519] kasan_report+0xbe/0xf0 [ 38.039989] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.040615] vma_interval_tree_remove+0xc75/0xec0 [ 38.041221] vma_prepare+0xc54/0x11a0 [ 38.041699] __split_vma+0x5af/0x950 [ 38.042168] ? __pfx___split_vma+0x10/0x10 [ 38.042697] ? find_held_lock+0x2c/0x110 [ 38.043215] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.043795] ? lock_is_held_type+0x9f/0x120 [ 38.044340] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.044955] ? mtree_range_walk+0x632/0x900 [ 38.045512] ? mas_walk+0x5c7/0x7c0 [ 38.045990] do_vmi_munmap+0x1f1/0x2b0 [ 38.046477] mmap_region+0x1f9/0x2660 [ 38.046959] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.047482] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.048195] ? __pfx_lock_acquire+0x10/0x10 [ 38.048722] ? __pfx_mmap_region+0x10/0x10 [ 38.049256] ? security_mmap_addr+0x7d/0xa0 [ 38.049789] ? get_unmapped_area+0x1f5/0x3f0 [ 38.050348] do_mmap+0x854/0xf00 [ 38.050785] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.051275] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.051842] ksys_mmap_pgoff+0x3af/0x500 [ 38.052354] do_syscall_64+0x3f/0x90 [ 38.052832] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.053478] RIP: 0033:0x7f55c3318d82 [ 38.053936] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 38.056090] RSP: 002b:00007ffd7ad51e98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.056987] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f55c3318d82 [ 38.057826] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f55c2752000 [ 38.058664] RBP: 00007f55c2752000 R08: 0000000000000009 R09: 0000000000001000 [ 38.059518] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560bf94a7d90 [ 38.060355] R13: 00007ffd7ad51eb0 R14: 00007ffd7ad51ee0 R15: 00007ffd7ad52240 [ 38.061208] </TASK> [ 38.061503] [ 38.061719] Allocated by task 214: [ 38.062151] kasan_save_stack+0x22/0x50 [ 38.062662] kasan_set_track+0x25/0x30 [ 38.063154] __kasan_slab_alloc+0x59/0x70 [ 38.063687] kmem_cache_alloc+0x16b/0x370 [ 38.064200] vm_area_dup+0x20/0x160 [ 38.064659] __split_vma+0x170/0x950 [ 38.065120] split_vma+0xc6/0x110 [ 38.065560] mprotect_fixup+0x8d2/0xb30 [ 38.066069] do_mprotect_pkey+0x87e/0xd40 [ 38.066589] __x64_sys_mprotect+0x78/0xc0 [ 38.067108] do_syscall_64+0x3f/0x90 [ 38.067604] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.068249] [ 38.068467] Freed by task 214: [ 38.068863] kasan_save_stack+0x22/0x50 [ 38.069371] kasan_set_track+0x25/0x30 [ 38.069862] kasan_save_free_info+0x2b/0x50 [ 38.070397] __kasan_slab_free+0x10a/0x190 [ 38.070925] kmem_cache_free+0x10d/0x4d0 [ 38.071443] rcu_core+0x8c8/0x2860 [ 38.071882] __do_softirq+0x1b7/0x7d4 [ 38.072362] [ 38.072576] Last potentially related work creation: [ 38.073157] kasan_save_stack+0x22/0x50 [ 38.073660] __kasan_record_aux_stack+0x8e/0xa0 [ 38.074234] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.074878] remove_vma+0x139/0x170 [ 38.075337] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.075902] do_vmi_munmap+0x1f1/0x2b0 [ 38.076390] __vm_munmap+0x138/0x3a0 [ 38.076856] __x64_sys_munmap+0x59/0x80 [ 38.077347] do_syscall_64+0x3f/0x90 [ 38.077822] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.078456] [ 38.078673] The buggy address belongs to the object at ffff88801a1e52b8 [ 38.078673] which belongs to the cache vm_area_struct of size 168 [ 38.080152] The buggy address is located 88 bytes inside of [ 38.080152] freed 168-byte region [ffff88801a1e52b8, ffff88801a1e5360) [ 38.081551] [ 38.081772] The buggy address belongs to the physical page: [ 38.082423] page:000000005ba6f2ee refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1e5 [ 38.083528] memcg:ffff8880144faf01 [ 38.083956] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.084593] page_type: 0xffffffff() [ 38.085044] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 38.085953] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144faf01 [ 38.086873] page dumped because: kasan: bad access detected [ 38.087551] [ 38.087773] Memory state around the buggy address: [ 38.088350] ffff88801a1e5200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.089215] ffff88801a1e5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.090076] >ffff88801a1e5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.090943] ^ [ 38.091404] ffff88801a1e5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.092296] ffff88801a1e5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.093149] ================================================================== [ 38.094131] Disabling lock debugging due to kernel taint [ 40.435229] BUG: Bad rss-counter state mm:00000000d53e2c8d type:MM_FILEPAGES val:33 [ 40.436222] BUG: Bad rss-counter state mm:00000000d53e2c8d type:MM_ANONPAGES val:22 [ 40.976859] BUG: Bad rss-counter state mm:000000003ba5a30e type:MM_FILEPAGES val:33 [ 40.978011] BUG: Bad rss-counter state mm:000000003ba5a30e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20082' (ECDSA) to the list of known hosts. 2023/06/19 17:03:42 fuzzer started 2023/06/19 17:03:42 dialing manager at localhost:44161 2023/06/19 17:03:42 checking machine... 2023/06/19 17:03:42 checking revisions... [ 41.573429] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:03:42 testing simple program... [ 41.624798] cgroup: Unknown subsys name 'net' [ 41.661209] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:03:34 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=00000000c2566d44 RCX=ffff88806c736a20 RDX=000000000000000d RSI=0000000000000002 RDI=00000000398e5635 RBP=ffff88800cb90130 RSP=ffff888015d1f5f0 R8 =000000009afd6d25 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff888015d1f658 R15=000000000000000d RIP=ffffffff82270f2d RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc53d3d7900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffcaac8a000 CR3=000000001a358000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf09e08 RBX=0000000000000002 RCX=ffffffff86137d01 RDX=1ffff1100d9e135c RSI=ffffffff8180c8da RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff86137dd6 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffff88806cf09b60 R13=ffff88806cf09ae0 R14=ffff888008d751c0 R15=ffff88806cf09a98 RIP=ffffffff81130664 RFL=00000282 [--S----] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fc03679a9a0 CR3=000000000dc7e000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2031343a33303a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a33303a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000